The Cobalt Hammer was a heavy bomber, specifically an MG-100 StarFortress SF-17, that belonged to Cobalt Squadron within the ranks of the Resistance.

During the evacuation of D'Qar, the Cobalt Hammer participated in a bombing run targeting a Mandator IV-class Siege Dreadnought. Many bombers were destroyed by TIE fighters and space debris, leaving only the Cobalt Hammer as the last hope to destroy the Dreadnaught, known as the Fulminatrix, with its payload. However, Nix Jerd, the bombardier, was rendered unconscious. Consequently, Paige Tico, a gunner, was forced to take over the bomb activation process. She ascended the ladder and was about to activate the bombs when a TIE fighter's attack caused an explosion in the cockpit, killing both the pilot, Finch Dallow, and the flight engineer. The blast propelled Tico off the ladder and onto a nearby catwalk. After repeatedly kicking the access ladder, the detonator fell. She managed to catch it and released the bombs onto the Dreadnaught. The subsequent explosion resulted in the destruction of both the Dreadnaught and the Cobalt Hammer, resulting in the deaths of everyone aboard both vessels.